Paper transmitting apparatus for printer

ABSTRACT

A paper transmitting apparatus for a printer, comprises a bracket comprising a paper tray mounted thereon, the paper tray is adapted to receive a piece of paper in the paper tray; and a driving mechanism comprising a roller rotatablely mounted on the driving mechanism, a sleeve fitted around the roller, a plurality of grains located on an outer surface of the sleeve to increase a surface roughness of the outer surface of the sleeve, the outer surface of the sleeve rests on the piece of paper, and the driving mechanism is adapted to rotate the roller to move the piece of paper on the paper tray.

BACKGROUND

1. Technical Field

The present disclosure relates to a paper transmitting apparatus for aprinter.

2. Description of Related Art

Printers are widely used. For transmitting papers in a printer, a papertransmitting apparatus is used in the printer. The paper transmittingapparatus usually includes a rotatable roller. The roller contactspapers to bring papers moving in the printer. When the roller is usedfor a long period of time, the roller may be burnished smooth by papers,and such a roller may not move the papers efficiently.

Therefore, there is room for improvement within the art.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referenceto the following drawings. The components in the drawings are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the embodiments. Moreover, in thedrawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is an exploded and isometric view of an embodiment of a papertransmitting apparatus for a printer.

FIG. 2 is an isometric view of a roller of the paper transmittingapparatus of FIG. 1.

FIG. 3 is an assembly view of the paper transmitting apparatus of FIG.1.

FIG. 4 is another assembly view of the paper transmitting apparatus ofFIG. 1.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references mean at least one.

Referring to FIG. 1, a paper transmitting apparatus for a printerincludes a bracket 10 and a driving mechanism 30. The bracket 10 ismounted on the printer.

The bracket 10 includes a first board 11, and a second board 13perpendicular to the first board 11. A paper tray 14 is mounted on thefirst board 11. Pieces of paper 50 are located on the paper tray 14. Thesecond board 13 defines an opening 131. The opening 131 is aligned withthe paper tray 14.

Referring to FIGS. 1 and 2, the driving mechanism 30 includes a carrier31. The rear portion of the carrier 31 is pivotally mounted on theprinter. A roller 32 is pivotally mounted on the front portion of thecarrier 31. Two sleeves 35 are fitted on the roller 32, wherein each ofthe two sleeves 35 has a central line. A plurality of grains 37 areintegrally formed on each of the two sleeves 35 and fluted on an outersurface of each of the two sleeves 35. A symmetry of the plurality ofgrains 37 about the central line of each of the sleeve 35 resembles anarrowhead pointing forwards. A motor (not shown) is mounted on thedriving mechanism 30. A plurality of gears 34 links the motor and theroller 32. The motor rotates the roller 32 via the plurality of gears34. The two sleeves 35 rotate with the roller 32.

Referring to FIGS. 1 to 4, in assembly, the bracket 10 is mounted in theprinter. The rear portion of the carrier 31 is pivotally mounted on theprinter. The driving mechanism 30 rotates on the printer between a firstposition and a second position. In the first position, the roller 32 islocated above the paper tray 14 and does not contact the paper tray 14.In the second position, the two sleeves 35 of the roller 32 rest on thepaper tray 14 or on any pieces of paper 50 in the paper tray 14.

When the driving mechanism 30 is positioned in the second position, ifthere is any pieces of paper 50 in the paper tray 14, the two sleeves 35come in contact with the pieces of paper 50. The motor rotates theroller 32 to move the pieces of paper 50. The two sleeves 35 cause thepieces of paper 50 to slide on the paper tray 14 and through the opening131.

Because there are a plurality of grains 37 fluted on the outer surfaceof each of the two sleeves 35, even if the two sleeves 35 becomeburnished over time by making contact with the pieces of paper 50,friction force of the plurality of grains 37 still remains and maycontinue to move the pieces of paper 50.

Although numerous characteristics and advantages of the embodiments havebeen set forth in the foregoing description, together with details ofthe structure and functions of the embodiments, the disclosure isillustrative only, and changes may be made in detail, especially in thematters of shape, size, and arrangement of parts within the principlesof the invention to the full extent indicated by the broad generalmeaning of the terms in which the appended claims are expressed.

1. A paper transmitting apparatus for a printer, comprising: a bracketcomprising a paper tray mounted thereon, the paper tray is adapted toreceive a piece of paper in the paper tray; and a driving mechanismcomprising a roller rotatablely mounted on the driving mechanism, asleeve fitted around the roller, a plurality of grains located on anouter surface of the sleeve to increase a surface roughness of the outersurface of the sleeve, the outer surface of the sleeve rests on thepiece of paper, and the driving mechanism is adapted to rotate theroller to move the piece of paper on the paper tray.
 2. The papertransmitting apparatus of claim 1, wherein the plurality of grains aresymmetric about a central line of the sleeve.
 3. The paper transmittingapparatus of claim 1, wherein the driving mechanism is adapted to movebetween a first position and a second position; in the first position,the roller is located above the paper tray and does not contact thepaper tray; and in the second position, the outer surface of the sleeverests on the piece of paper or the paper tray.
 4. The paper transmittingapparatus of claim 1, wherein the bracket comprises a first board, and asecond board approximately perpendicular to the first board, the secondboard defines an opening, the opening is aligned with the paper tray,and the opening is adapted to allow the piece of paper to pass throughthe opening when the piece of paper is moved on the paper tray.
 5. Thepaper transmitting apparatus of claim 4, wherein the paper tray ismounted on the first board.
 6. The paper transmitting apparatus of claim1, wherein a plurality of gears are linked with the roller, and theplurality of gears rotate to rotate the roller.
 7. A paper transmittingapparatus for a printer, comprising: a bracket comprising a first board,and a second board approximately perpendicular to the first board, apaper tray mounted on the first board, the second board defining anopening which is aligned with the paper tray, the paper tray is adaptedto receive a piece of paper in the paper tray; and a driving mechanism,the driving mechanism comprises a roller with a sleeve fitted around theroller, a plurality of grains located on an outer surface of the sleeveto increase a surface roughness of the outer surface of the sleeve, theouter surface of the sleeve rests on the piece of paper, and the drivingmechanism is adapted to rotate the roller to move the piece of paperthrough the opening.
 8. The paper transmitting apparatus of claim 7,wherein the plurality of grains are symmetric to a central line of thesleeve.
 9. The paper transmitting apparatus of claim 7, wherein theroller is rotatablely mounted on the driving mechanism, the drivingmechanism is adapted to move between a first position and a secondposition; wherein in the first position, the roller is located above thepaper tray and does not contact the paper tray; and in the secondposition, the outer surface of the sleeve rests on the piece of paper orthe paper tray.
 10. The paper transmitting apparatus of claim 7, whereina plurality of gears are linked with the roller, and the plurality ofgears rotate to rotate the roller.